An interesting graphic from The American Conservative.
Presidents have more latitude in foreign affairs than in domestic policy, and the trend over the past two administrations has been for presidents to be more hawkish than their campaign pledges led voters to expect. George W. Bush promised a “humble foreign policy.” Instead, he gave us the Iraq War. Barack Obama was elected in part to end Bush’s wars. But he too pursued regime change, with Pyrrhic success in Libya and abortively in Syria.
These examples are alarming precedents for the next administration. The Democrats and Republicans vying for their parties’ nominations have staked out a range of positions on the wars in Iraq, Syria, and Libya, as well as on the nuclear deal with Iran and relations with Russia in light of Vladimir Putin’s aggression toward Ukraine. The different magnitudes of U.S. military spending the contenders propose also suggest something about how interventionist each will prove to be. Campaign statements are not, however, a sure guide to what anyone will do in office.